ISO 



(For figures of pnparia see PI. \11, fig'. 3, 4, 5, 5a, 5b. 6, 7, 8 

 and 9). 



CLASSIFICATION. 



Verrall divides the British species of Pipniiculus, which are 

 fair representatives of the European forms, into five groups. 

 Three of these have a pigmented stigma and are divided as fol- 

 lows: 



I. Abdomen quite' dull, not even the margins shining, femora 



without any ciliation or pubescence behind. 



II. Abdomen partly shining; femora ciliate or pubescent at 



least behind the middle pair; thorax and scutellum with 

 dense but short pubescence. 



III. Thorax and scutellum practically bare, as well as the 



femora; the abdomen considerably shininig. 

 The other groups are without a pigmented stigma and are 

 separated thus: 



IV. Small or discal cross-vein far before the middle of the 



discal cell, eyes frequently not quite touching on the 

 frons in the male. 



V. Small cross-vein placed at or about the middle of the discal 



cell. 

 Both the Australian and Hawaiian species known to me 

 divide into stigmated and non-stigmated sections, but the fur- 

 ther division into groups on the characters used by Verrall is 

 not very satisfactory, if indeed possible, with the species here 

 considered. In the following table I have therefore used other 

 characters for the groups. 

 Wings with a pigmented stigma. 



Stigma not bounded by a cross-vein at the base. 



Third antennal joint sharply pointed at the tip, usually 

 acuminately produced. 

 Basal abdominal segment with some l)lack bristles on 



each side I 



Basal abdominal segment with no trace of such bristles, 

 and if pubescent, then the hairs similar to the general 



clothing II 



Third antennal joint rounded at tip, or at least not acute, 



and never acuminately produced Ill 



Stigma bounded by a distinct cross-vein at the base IV 



Wings without a pigmented stigma. 



